Table 1.

Maternal microchimerism in fetal LNs. We analyzed fetal mesenteric lymph nodes (18 to 22 g.w.) for levels of maternal microchimerism with the use of two separate assays (16). Informative HLA types and/or insertion/deletion (in/del) polymorphisms are listed for each donor. “None” refers to situations where no informative HLA type or polymorphisms were identified; “Neg.” refers to samples where no microchimerism was detected; N.A., not applicable.

Sample number	HLA type/(in/del) marker	% Microchimerism (HLA type)	% Microchimerism (in/del)
1	DR13/SO10	0.3860%	0.3080%
2	None/SO3	N.A.	0.1640%
3	DR11/None	0.8260%	N.A.
4	DR4/None	0.0035%	N.A.
5	None/None	N.A.	N.A.
6	DR9/SO7B	0.0370%	0.0906%
7	DR1/SO6	0.0650%	0.0190%
8	DR13/None	Neg.	N.A.
9	DR7/SO8	0.1780%	0.4934%
10	SO6/None	0.0062%	N.A.
11	None/SO9 SO10	N.A.	0.0070% 0.0039%
12	DR1/SO4B	0.0312%	0.0234%
13	None/SO9 SO11	N.A.	0.4869% 0.1933%
14	DR1/None	0.3663%	N.A.
15	DR15/SO3	Neg.	Neg.
16	DR11/None	0.0114%	N.A.
17	DR15/SO3	0.0161%	0.006%
18	DR15/None	0.1158%	N.A.